CN103945434A - Method of promoting terminal roaming in WLAN network and device - Google Patents

Method of promoting terminal roaming in WLAN network and device Download PDF

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Publication number
CN103945434A
CN103945434A CN201310025276.0A CN201310025276A CN103945434A CN 103945434 A CN103945434 A CN 103945434A CN 201310025276 A CN201310025276 A CN 201310025276A CN 103945434 A CN103945434 A CN 103945434A
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China
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wireless terminal
roaming
current
probe response
wireless
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CN201310025276.0A
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CN103945434B (en
Inventor
徐国祥
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Hangzhou H3C Technologies Co Ltd
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Hangzhou H3C Technologies Co Ltd
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Priority to CN201310025276.0A priority Critical patent/CN103945434B/en
Priority to EP13872319.2A priority patent/EP2949154A4/en
Priority to PCT/CN2013/088300 priority patent/WO2014114142A1/en
Priority to US14/650,464 priority patent/US9549357B2/en
Publication of CN103945434A publication Critical patent/CN103945434A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/16—Threshold monitoring
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H04W36/302—Reselection being triggered by specific parameters by measured or perceived connection quality data due to low signal strength
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/34—Reselection control
    • H04W36/38—Reselection control by fixed network equipment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/22—Processing or transfer of terminal data, e.g. status or physical capabilities
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10—Small scale networks; Flat hierarchical networks
    • H04W84/12—WLAN [Wireless Local Area Networks]

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Databases & Information Systems (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention provides a method of promoting terminal roaming in a WLAN network and a device. When the strength of signals of a wireless terminal associated with an AP (access point) is smaller than the preset threshold, the AP actively sends Probe response frames to the wireless terminal, the wireless terminal timely senses that the strength of wireless signals provided by the current AP can not meet service requirements through receiving the Probe response frame information, and roaming of the wireless terminal is thus promoted.

Description

In a kind of wlan network, promote method and the device of terminal roaming
Technical field
The present invention relates to data communication field, relate in particular to the method and the device that in a kind of wlan network, promote terminal roaming.
Background technology
WLAN(Wireless LAN, WLAN (wireless local area network)) wireless system such as the relative GSM of system, 3G is a kind of relatively loose Radio Network System.In wlan system, AP(Access Point, WAP (wireless access point)) and wireless terminal is toward each other independently.At mutual mutual message and set up after link connection, AP, except the link of terminal being disconnected, can not control other behaviors of wireless terminal.
This implementation of wlan network, causes wireless terminal need to tackle independently different network environments, so just there has been different implementations in each producer.The most obvious, terminal is roamed across AP, the performance between different radio terminal is just widely different.Some wireless terminals can be switched to fast on this new AP when approaching new AP, when the signal strength signal intensity of the AP that some terminals but require in current connection is low-down, just can be switched to new AP upper, and this has just produced so-called " viscous " phenomenon.In addition, due to the difference in the scanning behavior realization of different manufacturers wireless terminal, many wireless terminals are in the reasonable situation of the AP of current connection signal, very slow to the scanning of other AP.In the situation that wireless terminal roaming behavior is slightly fast, cause the change in signal strength of AP to have obvious hysteresis like this, further to roaming, bring impact.
Summary of the invention
In view of this, this patent provides the method and apparatus that promotes terminal roaming in a kind of wlan network, to solve the problem existing in wireless terminal roaming process in prior art.
The present invention is achieved by the following scheme.
In wlan network, promote a method for terminal roaming, described method is applied to include in the wireless network of at least two AP and a wireless terminal composition, and wherein said method comprises the steps:
Step 1, AP regularly obtain signal quality and/or the data transmission quality of wireless terminal;
Whether signal quality and/or the data transmission quality of the wireless terminal that step 2, AP judgement are obtained are less than default threshold value, if so, carry out steps 3, otherwise, proceed to step 4;
Step 3, AP send Probe response frame to wireless terminal, impel wireless terminal roaming;
Step 4, AP provide normal wireless access service for wireless terminal.
Further, when the probe response frame information of AP transmission arrives wireless terminal, the wireless signal strength that the current AP of wireless terminal perception provides can not meet service request, thereby scans and roam in neighbor AP.
Further, when all AP manage under same AC, AP to AC, judges whether to allow wireless terminal roaming by AC to another adjacent AP according to the reported result of each AP by the information of real-time collecting wireless terminal, current channel seizure ratio information reporting.
Further, when AC determines to allow wireless terminal roam into another target AP from its current AP, AC notifies current AP and target AP initiatively to this wireless terminal, to send probe response frame, the current AP of probe response frame perception that wireless terminal sends by current AP and target AP and the change in signal strength of target AP, thereby select target AP roaming on it initiatively.
Further, described AP, by regularly receiving the signal strength signal intensity of this wireless terminal of received signal strength indicator acquisition of information of wireless terminal transmission, obtains the data transmission quality of wireless terminal by the packet loss of transfer of data between statistics AP and wireless terminal.
Further, described AP can also improve the effect that probe response frame impels wireless terminal roaming by expanding the cycle of the beacon frame of AP transmission.
The present invention also provides the device that promotes terminal roaming in a kind of wlan network simultaneously, and described application of installation is in including the wireless network of at least two AP and a wireless terminal composition, and described device is specially AP, and wherein said device comprises:
Acquisition of information module, for regularly obtaining signal quality and/or the data transmission quality of wireless terminal;
Judge module relatively, for comparing and judge the signal quality of the wireless terminal obtaining and/or data transmission quality and default threshold value;
Signal is informed module, for signal quality and/or data transmission quality when wireless terminal, is less than default threshold value, sends described device signal strength signal intensity inform message to wireless terminal, impels wireless terminal roaming.
Further, described signal strength signal intensity informs that message is specially probe response frame information, when described device signal strength signal intensity informs that message arrives wireless terminal, the wireless signal strength that the current AP of wireless terminal perception provides can not meet service request, thereby scans and roam in neighbor AP.
Further, when all devices are all managed under same AC, acquisition of information module to AC, judges whether to allow wireless terminal roaming by AC to another adjacent AP according to the reported result of each device by the information of real-time collecting wireless terminal, current channel seizure ratio information reporting.
Further, when AC determines to allow wireless terminal from its current apparatus for roaming to another target AP, AC notifies the signal of current device and target AP to inform that module initiatively sends probe response frame information to wireless terminal, wireless terminal is by the change in signal strength of the current device of described probe response frame information perception and target AP, thus select target AP roaming on it initiatively.
Further, described acquisition of information module, by regularly receiving the signal strength signal intensity of this wireless terminal of received signal strength indicator acquisition of information of wireless terminal transmission, is obtained the data transmission quality of described wireless terminal by the packet loss of transfer of data between statistics AP and wireless terminal.
Further, described device also includes configuration module, for the cycle of the threshold value of pre-configured comparison and/or the beacon frame of AP transmission.
Further, described configuration module specifically improves by expanding the cycle of the beacon frame of AP transmission the effect that probe response frame impels wireless terminal roaming.
Compared with prior art, the present invention is by changing the behavior of AP side, utilize AP initiatively wireless terminal to be sent to Probe response frame, affect the AP signal strength signal intensity of wireless terminal perception, thereby affect the signal strength signal intensity perceived effect of wireless terminal to AP, reach the effect of impelling wireless terminal roaming.
Accompanying drawing explanation
Fig. 1 is the method schematic diagram that promotes terminal roaming in wlan network of the present invention.
Fig. 2 is one embodiment of the invention application scenarios schematic diagram.
Fig. 3 is another embodiment of the present invention application scenarios schematic diagram.
Fig. 4 is the apparatus structure schematic diagram that promotes terminal roaming in wlan network of the present invention.
Embodiment
In order to realize the object of the invention, the core concept that technical solution of the present invention adopts is: when the signal strength signal intensity of the wireless terminal associated with AP is less than predefined threshold value, AP initiatively sends probe response frame to wireless terminal, make wireless terminal can not meet service request by receiving this probe response frame wireless signal strength that the current AP of perception provides rapidly, thereby impel the roaming of wireless terminal.
In order to make the present invention more clear and clear, below in conjunction with the drawings and specific embodiments, technical solution of the present invention is described in detail.
Please refer to Fig. 1, for promoting the method schematic diagram of terminal roaming in wlan network of the present invention.Described method is applied to include in the wireless network of at least two AP and a wireless terminal composition, and described method comprises the steps:
Step 1, AP regularly obtain signal quality and/or the data transmission quality of wireless terminal.
In this step, when wireless terminal be associated with certain AP upper after, AP, by regularly receiving the received signal strength indicator (RSSI, Received Signal Strength Indicator) that wireless terminal sends, obtains the signal quality of this wireless terminal; In addition, in the present invention, also can not obtain the signal quality of wireless terminal, and only obtain the data transmission quality of wireless terminal; Or, in order to improve the roaming effect of wireless terminal in WLAN of the present invention, the signal quality of the wireless terminal of the association of obtaining and data transmission quality simultaneously.Wherein, in the preferred embodiment of the present invention, the data transmission quality of wireless terminal specifically can be realized by the packet loss information of transfer of data between the wireless terminal of statistics AP and associated.
Whether signal quality and/or the data transmission quality of the wireless terminal that step 2, AP judgement are obtained are less than default threshold value, if so, carry out steps 3, otherwise, proceed to step 4.
In this step, AP compares the signal quality of the wireless terminal obtaining and/or data transmission quality and default threshold value, if signal quality and/or the data transmission quality of judgement current wireless terminal are less than default threshold value, show that the wireless access service quality that current AP provides does not reach requirement, the wireless terminal of associated need to roam into and on other AP, carry out Wireless Data Transmission; Otherwise, if the signal quality of current wireless terminal and/or data transmission quality are more than or equal to default threshold value, show that wireless access service quality that current AP provides can meet user's access requirement, current AP can continue as this wireless terminal access service is provided.
It should be noted that, when concrete realization, AP can be only compares the signal quality of the wireless terminal obtaining and default threshold value; Also can be only the data transmission quality of the wireless terminal obtaining and default threshold value be compared.Yet, in order to impel the roaming effect of wireless terminal in WLAN of the present invention, in the present invention, preferably, AP compares the signal quality of the wireless terminal obtaining and data transmission quality and default threshold value simultaneously, as long as one of them (signal quality of wireless terminal or data transmission quality) is less than default threshold value, judge that the wireless access service that current AP provides can not meet the demands, now, the wireless terminal of associated need to roam into and on other AP, carry out wireless access, so just can guarantee wireless terminal no matter when and where, user all can be provided high-quality wireless access service.
Step 3, AP send Probe response frame to wireless terminal, impel wireless terminal roaming.
In this step, when AP judges that by abovementioned steps 3 signal strength signal intensity of the wireless terminal that it obtains and/or data transmission quality information are less than default threshold value more afterwards, think that himself does not meet the demands for access service that wireless terminal provides, in the service range that the wireless terminal of current associated does not provide at it, now, described AP will initiatively send probe response frame to wireless terminal, make wireless terminal by receiving described probe response frame information, the wireless access service that comes the current AP of perception rapidly to provide does not meet the demands, thereby impel its scanning and roam in other neighbor AP.
Step 4, AP provide normal wireless access service for wireless terminal.
In this step, when AP judges that by abovementioned steps 3 signal strength signal intensity of the wireless terminal that it obtains or data transmission quality information are more than or equal to default threshold value more afterwards, think that in the wireless access service range that wireless terminal still provides at it, described AP can provide normal wireless access service for wireless terminal.Under this situation, described AP does not initiatively send probe response frame to wireless terminal, when receiving the probe response frame that wireless terminal sends, with relatively high power, respond the probe response of this wireless terminal, make this wireless terminal can keep being associated on this current AP.
Further, described AP can also be by expanding the cycle of the beacon frame that AP sends, and improves the effect that probe response frame that AP initiatively sends impels wireless terminal roaming.Due to beacon frame (the notice frame of AP broadcast, the service being provided with notice STA AP, wherein carried service ability, enciphered message and service parameter etc.) be the indication that AP externally provides service, represent the service range of AP, for avoiding producing, cover black hole, the transmitted power of beacon is generally constant simultaneously.If the transmission cycle of the beacon frame that AP is sent expands, as expanded as 200 milliseconds from 100 milliseconds, can make wireless terminal according to the probe response frame receiving, carry out perception AP signal strength signal intensity more, and then for impelling its roaming more to produce effect.
As shown in Figure 2, for impel a certain embodiment application scenarios schematic diagram of wireless terminal roaming according to the inventive method.Under this embodiment application scenarios, after wireless terminal is associated with on certain AP, AP is by current signal quality and/or the data transmission quality of this wireless terminal of the Receive message of sending according to wireless terminal.AP judges according to the signal quality of wireless terminal and/or data transmission quality whether wireless terminal will be roamed and leaves.While being less than default threshold value as the signal quality when AP judgement wireless terminal and/or data transmission quality, think that wireless terminal will leave this AP, otherwise, think that wireless terminal is still in this AP service range.When AP thinks that wireless terminal will leave, initiatively to wireless terminal, send probe response frame, make wireless terminal by receiving described probe response frame information, the signal strength signal intensity that the current AP of perception provides rapidly can not meet wireless access requirement, thereby scans and roam in other neighbor AP.Particularly, in this example, the mode that described AP initiatively sends probe response frame can be periodically, in addition, can send several probe response frames at every turn.For example, the cycle that AP initiatively sends probe response frame is 2 seconds, and each timing finishes 5 probe response frame messages of rear transmission.
As shown in Figure 3, for impel another embodiment application scenarios schematic diagram of wireless terminal roaming according to the inventive method.Under this application scenarios, all AP are under same AC management, the information reportings such as the information of AP by all wireless terminals of real-time collecting (comprising whether association, signal strength signal intensity, associated SSID etc.), current channel seizure ratio, to AC, judge whether to allow wireless terminal roaming by AC to another adjacent AP according to the reported result of each AP.When AC determines to allow certain wireless terminal be assumed to be AP1 from its current AP() roam into another AP(and be assumed to be AP2) time, AC notice AP1 and AP2 send probe response frame initiatively to this wireless terminal, make wireless terminal according to the described probe response frame information receiving come fast, the change in signal strength of perception AP1 and AP2 in time, thereby initiatively select AP2 and roam on it.In like manner, under the present embodiment application scenarios, the mode that AP initiatively sends probe response frame can be periodically, and sends several probe response frame messages at every turn.For example, the cycle that AP initiatively sends probe response frame is 2 seconds, and each timing finishes 5 messages of rear transmission.
As shown in Figure 4, for promoting the apparatus structure schematic diagram of terminal roaming in wlan network of the present invention.Described application of installation is in including the wireless network of at least two AP and a wireless terminal composition, and described device is specially AP in the present invention, comprising:
Acquisition of information module, for regularly obtaining signal quality and/or the data transmission quality of wireless terminal.
Particularly, after wireless terminal is associated with on described device, described acquisition of information module regularly receives the received signal strength indicator information (RSSI, Received Signal Strength Indicator) that wireless terminal sends, to obtain the signal quality of this wireless terminal; The data transmission quality of the wireless terminal of the association that in addition, described acquisition of information module can also be obtained as required.
Judge module relatively, for comparing the signal quality of the wireless terminal obtaining and/or data transmission quality and default threshold value judge.
Particularly, the signal quality of the wireless terminal that described relatively judge module obtains acquisition of information module and/or data transmission quality and default threshold value compare, if the signal quality of current wireless terminal and/or data transmission quality are less than default threshold value, show that the current wireless access service quality providing of described device does not reach requirement, notification signal inform module initiatively strength of transmitted signals inform message, impel the wireless terminal roaming associated with described device to carry out Wireless Data Transmission to other AP; Otherwise, if the signal quality of current wireless terminal and/or data transmission quality are greater than default threshold value, show that the current wireless access service quality providing of described device can meet user's access requirement, current described device can continue as this wireless terminal access service is provided.
It should be noted that, when concrete realization, described relatively judge module can be only compares the signal quality of the wireless terminal obtaining and default threshold value; Also can be only the data transmission quality of the wireless terminal obtaining and default threshold value be compared.Yet, in order to impel the roaming effect of wireless terminal in WLAN of the present invention, in the present invention, preferably, described relatively judge module compares the signal quality of the wireless terminal obtaining and data transmission quality and default threshold value simultaneously, as long as one of them (signal quality of wireless terminal or data transmission quality) is less than default threshold value, judge that the current wireless access service providing of described device can not meet the demands, now, described relatively judge module need announcement information inform module initiatively strength of transmitted signals inform message, impel the wireless terminal roaming of associated to carry out wireless access to other AP, so just can guarantee wireless terminal no matter when and where, user all can be provided high-quality wireless access service.
Signal is informed module, for signal quality and/or data transmission quality when wireless terminal, is less than default threshold value, to wireless terminal strength of transmitted signals, informs message, impels wireless terminal roaming.
Particularly, when the signal strength signal intensity of more afterwards learning wireless terminal that it obtain of described device by aforementioned relatively judge module or data transmission quality information are less than default threshold value, think that himself does not meet the demands for access service that wireless terminal provides, in the service range that the wireless terminal of associated does not provide at it, now, described signal informs that module informs message by the signal strength signal intensity that initiatively sends described device to wireless terminal, impels wireless terminal to leave.Particularly, described signal strength signal intensity informs that message is that signal is informed the probe response frame information that module initiatively sends to wireless terminal, wireless terminal receives after this probe response frame, the wireless access service that the current AP of perception provides rapidly does not meet the demands, thereby scans and roam in neighbor AP.
Further, when all devices of the present invention are all managed under same AC, acquisition of information module to AC, judges whether to allow wireless terminal roaming to another target AP by AC according to the reported result of each device by the information of real-time collecting wireless terminal, current channel seizure ratio information reporting.When AC determines to allow wireless terminal from its current apparatus for roaming to another target AP, AC notifies the signal strength signal intensity of current device and target AP to inform that module initiatively sends probe response frame to this wireless terminal, the current device of the timely perception of probe response frame that wireless terminal sends by described current device and target AP and the change in signal strength of target AP, thereby select target AP roaming on it initiatively.
In addition, device of the present invention also includes configuration module, for the cycle of the threshold value of pre-configured comparison and/or the beacon frame of AP transmission.
Particularly, by described configuration module, configuring after default threshold value, when AP learns that by described relatively judge module the signal strength signal intensity of the wireless terminal obtaining or data transmission quality information are more than or equal to default threshold value more afterwards, think in the wireless access service range that wireless terminal still provides at it, for wireless terminal provides normal wireless access service.In this case, described signal informs that module does not initiatively send probe response frame to wireless terminal, when receiving the probe response frame that wireless terminal sends, described device only responds this wireless probe response of end finally with relatively high power, makes this wireless terminal can keep being associated on this current AP.Otherwise, when AP learns that by described relatively judge module the signal strength signal intensity of the wireless terminal obtaining or data transmission quality information are less than default threshold value more afterwards, notify described signal to inform that module sends the signal strength information of described device to wireless terminal, impel described wireless terminal roaming to other AP.
The cycle that described device can also expand the beacon frame sending by configuration is improved the effect that probe response frame impels wireless terminal roaming.Due to beacon frame (the notice frame of AP broadcast, the service being provided with notice wireless terminal AP, wherein carried service ability, enciphered message and service parameter etc.) be the indication that AP externally provides service, represent the service range of AP, for avoiding producing, cover black hole, the transmitted power of beacon is generally constant simultaneously.If the transmission cycle of the beacon frame that AP is sent expands, as expanded as 200 milliseconds from 100 milliseconds, can make wireless terminal according to the probe response frame receiving, carry out perception AP signal strength signal intensity more, and then for impelling its roaming more to produce effect.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of making, be equal to replacement, improvement etc., within all should being included in the scope of protection of the invention.

Claims (13)

1. in wlan network, promote a method for terminal roaming, described method is applied to include in the wireless network of at least two AP and a wireless terminal composition, it is characterized in that, described method comprises the steps:
Step 1, AP regularly obtain signal quality and/or the data transmission quality of wireless terminal;
Whether signal quality and/or the data transmission quality of the wireless terminal that step 2, AP judgement are obtained are less than default threshold value, if so, carry out steps 3, otherwise, proceed to step 4;
Step 3, AP send Probe response frame to wireless terminal, impel wireless terminal roaming;
Step 4, AP provide normal wireless access service for wireless terminal.
2. the method for claim 1, it is characterized in that, when the probe response frame information of AP transmission arrives wireless terminal, the wireless signal strength that the current AP of wireless terminal perception provides can not meet service request, thereby scans and roam in neighbor AP.
3. the method for claim 1, it is characterized in that, when all AP manage under same AC, AP to AC, judges whether to allow wireless terminal roaming by AC to another adjacent AP according to the reported result of each AP by the information of real-time collecting wireless terminal, current channel seizure ratio information reporting.
4. method as claimed in claim 3, it is characterized in that, when AC determines to allow wireless terminal roam into another target AP from its current AP, AC notifies current AP and target AP initiatively to this wireless terminal, to send probe response frame, the current AP of probe response frame perception that wireless terminal sends by current AP and target AP and the change in signal strength of target AP, thereby select target AP roaming on it initiatively.
5. method as claimed in claim 1 or 2, it is characterized in that, described AP, by regularly receiving the signal strength signal intensity of this wireless terminal of received signal strength indicator acquisition of information of wireless terminal transmission, obtains the data transmission quality of wireless terminal by the packet loss of transfer of data between statistics AP and wireless terminal.
6. method as claimed in claim 1 or 2, is characterized in that, described AP can also improve the effect that probe response frame impels wireless terminal roaming by expanding the cycle of the beacon frame of AP transmission.
7. in wlan network, promote a device for terminal roaming, described application of installation is in including the wireless network of at least two AP and a wireless terminal composition, and described device is specially AP, it is characterized in that, described device comprises:
Acquisition of information module, for regularly obtaining signal quality and/or the data transmission quality of wireless terminal;
Judge module relatively, for comparing and judge the signal quality of the wireless terminal obtaining and/or data transmission quality and default threshold value;
Signal is informed module, for signal quality and/or data transmission quality when wireless terminal, is less than default threshold value, sends described device signal strength signal intensity inform message to wireless terminal, impels wireless terminal roaming.
8. device as claimed in claim 7, it is characterized in that, described signal strength signal intensity informs that message is specially probe response frame information, when described device signal strength signal intensity informs that message arrives wireless terminal, the wireless signal strength that the current AP of wireless terminal perception provides can not meet service request, thereby scans and roam in neighbor AP.
9. device as claimed in claim 7, it is characterized in that, when all devices are all managed under same AC, acquisition of information module to AC, judges whether to allow wireless terminal roaming by AC to another adjacent AP according to the reported result of each device by the information of real-time collecting wireless terminal, current channel seizure ratio information reporting.
10. device as claimed in claim 9, it is characterized in that, when AC determines to allow wireless terminal from its current apparatus for roaming to another target AP, AC notifies the signal of current device and target AP to inform that module initiatively sends probe response frame information to wireless terminal, wireless terminal is by the change in signal strength of the current device of described probe response frame information perception and target AP, thus select target AP roaming on it initiatively.
11. devices as claimed in claim 7, it is characterized in that, described acquisition of information module, by regularly receiving the signal strength signal intensity of this wireless terminal of received signal strength indicator acquisition of information of wireless terminal transmission, is obtained the data transmission quality of described wireless terminal by the packet loss of transfer of data between statistics AP and wireless terminal.
12. devices as claimed in claim 7, is characterized in that, described device also includes configuration module, for the cycle of the threshold value of pre-configured comparison and/or the beacon frame of AP transmission.
13. devices as claimed in claim 8, is characterized in that, described configuration module specifically improves by expanding the cycle of the beacon frame of AP transmission the effect that probe response frame impels wireless terminal roaming.
CN201310025276.0A 2013-01-22 2013-01-22 Promote the method and device of terminal roaming in a kind of wlan network Active CN103945434B (en)

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Application Number Priority Date Filing Date Title
CN201310025276.0A CN103945434B (en) 2013-01-22 2013-01-22 Promote the method and device of terminal roaming in a kind of wlan network
EP13872319.2A EP2949154A4 (en) 2013-01-22 2013-12-02 Promoting wireless local area network (wlan) roaming
PCT/CN2013/088300 WO2014114142A1 (en) 2013-01-22 2013-12-02 Promoting wireless local area network (wlan) roaming
US14/650,464 US9549357B2 (en) 2013-01-22 2013-12-02 Promoting wireless local area network (WLAN) roaming

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CN104936255A (en) * 2015-06-29 2015-09-23 小米科技有限责任公司 Wireless access control method, device, router and terminal
CN105792290A (en) * 2014-12-23 2016-07-20 乐视移动智能信息技术（北京）有限公司 Method and device for controlling intelligent terminal to perform wireless roaming
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CN107846715A (en) * 2016-09-20 2018-03-27 深圳市盛路物联通讯技术有限公司 Access point switching method and device of the Internet of Things based on transmission rate
CN108235395A (en) * 2018-01-10 2018-06-29 重庆邮电大学 It is a kind of to realize wireless terminal in a wlan across the method for channel roaming switch
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